https://discussion.fedoraproject.org/t/cant-play-videos-in-firefox/79645/9
You need to install proprietary stuff. Basically just get the rpm fusion repositories and download the stuff. Or you can just download the flatpak
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https://discussion.fedoraproject.org/t/cant-play-videos-in-firefox/79645/9
You need to install proprietary stuff. Basically just get the rpm fusion repositories and download the stuff. Or you can just download the flatpak
I have no clue what is causing the problem. But can you try the below steps?
I would suggest you to create a new profile by going to about:profiles and opening youtube.
Or you can maybe try to refresh the firefox installtion.